Products by Wild Horse Winery and Vineyards:

"Fining agents are used on a lot-by-lot basis to optimize the quality. Some fining agents contain proteinaceous materials. Proteinaceous fining agents
are used to react with color and/or tannin molecules to make them removable by subsequent filtration. Both the fining agent, the color and/or tannin it reacts with are removed by the filtration process.

All of our fining agents are approved by the Alcohol & Tobacco Tax & Trade Bureau (TTB, formerly the Bureau of Alcohol, Tobacco and Firearms)